(5S,6R)-5-methyl-6-phenyl-5,6-dihydropyran-2-one | 765941-60-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃
• 英文名称: (5S,6R)-5-methyl-6-phenyl-5,6-dihydropyran-2-one
• 英文别名: (2R,3S)-3-methyl-2-phenyl-2,3-dihydropyran-6-one
• CAS: 765941-60-4
• 化学式: C₁₂H₁₂O₂
• 分子量: 188.226
• InChiKey: BDILTGVTEOHPIK-JOYOIKCWSA-N

物化性质

• 沸点：
  336.5±41.0 °C(Predicted)
• 密度：
  1.097±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (5S,6R)-5-methyl-6-phenyl-5,6-dihydropyran-2-one 在 吡啶 、 四氧化锇 、 N-甲基吲哚酮 作用下， 以 二氯甲烷 、 水 、 丙酮 为溶剂， 反应 6.0h， 生成 (4S,5S,6R)-4-Hydroxy-5-methyl-2-oxo-6-phenyl-tetrahydro-pyran-3-carbothioic acid O-phenyl ester
  参考文献：
  名称：

  Diastereoselective Dihydroxylation and Regioselective Deoxygenation of Dihydropyranones:  A Novel Protocol for the Stereoselective Synthesis of C₁−C₈ and C₁₅−C₂₁ Subunits of (+)-Discodermolide

  摘要：

  Diastereoselective dihydroxylation of dihydropyranones and subsequent regioselective alpha-deoxygenation provides 1,3-trans-beta-hydroxy-delta-lactones stereoselectively. This protocol has been applied for the synthesis of C-1-C-8 and C-15-C-21 subunits of (+)-discodermolide.

  DOI：

  10.1021/jo0492416
• 作为产物：
  描述：

  Acrylic acid (1R,2S)-2-methyl-1-phenyl-but-3-enyl ester 在 RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下， 以 甲苯 为溶剂， 反应 3.0h， 生成 (5S,6R)-5-methyl-6-phenyl-5,6-dihydropyran-2-one
  参考文献：
  名称：

  Diastereoselective Dihydroxylation and Regioselective Deoxygenation of Dihydropyranones:  A Novel Protocol for the Stereoselective Synthesis of C₁−C₈ and C₁₅−C₂₁ Subunits of (+)-Discodermolide

  摘要：

  Diastereoselective dihydroxylation of dihydropyranones and subsequent regioselective alpha-deoxygenation provides 1,3-trans-beta-hydroxy-delta-lactones stereoselectively. This protocol has been applied for the synthesis of C-1-C-8 and C-15-C-21 subunits of (+)-discodermolide.

  DOI：

  10.1021/jo0492416

文献信息

• Asymmetric Synthesis of Dihydropyranones via Gold(I)‐Catalyzed Intermolecular [4+2] Annulation of Propiolates and Alkenes
  作者：Hanbyul Kim、Su Yeon Choi、Seunghoon Shin

  DOI：10.1002/anie.201807514

  日期：2018.10

  Intermolecular asymmetric gold catalysis involving alkyne activation presents a significant challenge due to its distinct mechanistic mode from other metals. Herein, we report a highly enantioselective synthesis of α,β‐unsaturated δ‐lactones from [4+2] annulation of propiolates and alkenes in upto 95 % ee. Notably, for the desired chiral recognition, the choice of 1,1,2,2‐tetrachloroethane as solvent

  涉及炔烃活化的分子间不对称金催化由于其不同于其他金属的机理模式而提出了重大挑战。在本文中，我们报道了在高达95％ee的条件下，由丙酸酯和烯烃的[4 + 2]环化反应生成的高对映选择性的α，β-不饱和δ-内酯。值得注意的是，为获得所需的手性识别，选择1,1,2,2-四氯乙烷作为溶剂至关重要。此外，阴离子表面活性剂（十二烷基硫酸钠）提高了在环丙基金卡宾中间体的发散性方面的产物选择性。
• New β-Hydroxy Acylsilane-Derived Building Blocks and Their Use in the Synthesis of Oxygen-Containing Heterocycles
  作者：René Grée、Akondi Murthy、Thierry Roisnel、Srivari Chandrasekhar

  DOI：10.1055/s-0033-1339796

  日期：——

  Starting from easily accessible β-hydroxy acylsilanes, several 1C-, 2C- and 3C-extension reactions have been developed to efficiently afford five new functionalized building blocks, which have been used for the preparation of several five- and six-membered lactones.

  从容易获得的 β-羟基酰基硅烷开始，已经开发了几种 1C-、2C- 和 3C-延伸反应，以有效地提供五种新的官能化结构单元，这些结构单元已用于制备几种五元和六元内酯。